In digital signal technique , a signal that uses a positive ( or negative ) excursion and ground as the two binary signal states 在數字信號技術中,用正(或負)向電壓與地兩個電平來表示二進制“ 1 ”和“ 0 ”的一種信號
For example , one baud equals one bit per second in a train of binary signals and one3 - bit value per second in a train of signals each of which can assume one of eight different states 例如, 1波特在二進制信號序列中等于每秒1比特;在八種不同狀態中任選一種狀態的信號序列中等于每秒1個3位值。
The mcml circuits output low swing signal , while it is necessary to amplify it so as to interfacing the binary signal . an low - swing - signal - amplifying circuit is proposed in this dissertation to realize the interface 由于mcml電路輸出的是小擺幅信號,論文提出了一個三值放大電路,將三值mcml電路的輸出進行放大,以便進一步轉換,實現和二值信號的接口。
The method and performance according to the requirements are resolved mostly . main contents as follows : ( 1 ) according to the demodulation guideline , a differential detection system is applied to the dpsk signal demodulator , which is based on the analysis and comparison using the principle of optimal binary signal detection 著重解決在皮衛星體積結構,重量和功耗限制條件下的方案選擇和性能問題,具體內容包括: ( 1 )對一般二進制信號的最佳檢測原理進行分析比較,針對本系統要求選擇了dpsk信號差分檢測系統的方案。
Due to the multi - carrier transmission technology used in mc - cdma systems , almost all the previous synchronization algorithms in mc - cdma systems are derives from that in ofdm systems . they are suitable for ofdm systems , but they are not optimal for mc - cdma systems . the data symbols transmitted in mc - cdma systems have form of cdma signal , which is greatly different from normal binary signal 傳統的各種mc - cdma同步算法主要還是借鑒了ofdm的同步算法,本文提出采用用戶擴頻碼作idft后在fft之前作同步,充分利用了ofdm信號中所包含的mc - cdma信號形式,它與純粹的ofdm傳輸的二進制數據不同,它與pn序列具有更好的相關性。
The communication system ' s performance is briefly analyzed by channel capacity , which is a function of bit error rate ( ber ) . the decision rule is based on the most likelihood method . for reproducing the original binary signals more correctly , time scale transformation method and the approach of ensemble average probability of error bits are introduced 通過理論分析和仿真實驗,本文研究了這個非線性數字通信系統性能,給出了誤碼率和信道容量公式,提出了系統參數調節方法,采用最大似然法設計了適合這個系統輸出的判決規則。